$\log_{25}\left(625\right)$

$\lim_{x\to0}\left(\frac{cosm\left(x\right)-\cos n\left(x\right)}{x^2}\right)$

$\frac{dy}{dx}=\frac{y^3}{\left(x+4\right)}$

$\left(\cos\left(x\right)-\tan\left(x\right)\right)^2=\tan^2\left(x\right)-\left(1+\sin^2\left(x\right)\right)$

$-2\sin\left(t\right)\cos\left(t\right)$

$\frac{d^2}{dx^2}\left(\ln\left(x^2+y^2\right)\right)$

$\int\frac{\sqrt{2x^2-16}}{x^3}dx$